[Lldb-commits] [PATCH] D30287: Introduce support for Debug Registers in RegisterContextNetBSD_x86_64
Kamil Rytarowski via Phabricator via lldb-commits
lldb-commits at lists.llvm.org
Thu Feb 23 14:00:56 PST 2017
krytarowski added inline comments.
================
Comment at: source/Plugins/Process/Utility/RegisterContextNetBSD_x86_64.cpp:51-56
+ uint64_t dr[16]; /* debug registers */
+ /* Index 0-3: debug address registers */
+ /* Index 4-5: reserved */
+ /* Index 6: debug status */
+ /* Index 7: debug control */
+ /* Index 8-15: reserved */
----------------
clayborg wrote:
> Would it be nicer to have a union in here? Something like:
>
> ```
> struct DebugRegs
> {
> uint64_t debug_addr1;
> uint64_t debug_addr2;
> uint64_t debug_addr3;
> uint64_t reserved1;
> uint64_t reserved2;
> uint64_t debug_status;
> uint64_t debug_control;
> };
> struct DBG {
> union {
> uint64_t dr[16];
> DebugRegs regs;
> };
> };
> ```
I prefer to Follow Linux and FreeBSD here. I don't see similar union in other ports.
================
Comment at: source/Plugins/Process/Utility/RegisterContextNetBSD_x86_64.cpp:76
-//---------------------------------------------------------------------------
-// Cherry-pick parts of RegisterInfos_x86_64.h, without debug registers
-//---------------------------------------------------------------------------
-// Computes the offset of the given GPR in the user data area.
-#define GPR_OFFSET(regname) (LLVM_EXTENSION offsetof(GPR, regname))
-
-// Computes the offset of the given FPR in the extended data area.
-#define FPR_OFFSET(regname) \
- (LLVM_EXTENSION offsetof(UserArea, fpr) + \
- LLVM_EXTENSION offsetof(FPR, xstate) + \
- LLVM_EXTENSION offsetof(FXSAVE, regname))
-
-// Computes the offset of the YMM register assembled from register halves.
-// Based on DNBArchImplX86_64.cpp from debugserver
-#define YMM_OFFSET(reg_index) \
- (LLVM_EXTENSION offsetof(UserArea, fpr) + \
- LLVM_EXTENSION offsetof(FPR, xstate) + \
- LLVM_EXTENSION offsetof(XSAVE, ymmh[0]) + (32 * reg_index))
-
-// Number of bytes needed to represent a FPR.
-#define FPR_SIZE(reg) sizeof(((FXSAVE *)nullptr)->reg)
-
-// Number of bytes needed to represent the i'th FP register.
-#define FP_SIZE sizeof(((MMSReg *)nullptr)->bytes)
-
-// Number of bytes needed to represent an XMM register.
-#define XMM_SIZE sizeof(XMMReg)
-
-// Number of bytes needed to represent a YMM register.
-#define YMM_SIZE sizeof(YMMReg)
-
-// RegisterKind: EHFrame, DWARF, Generic, Process Plugin, LLDB
-
-// Note that the size and offset will be updated by platform-specific classes.
-#define DEFINE_GPR(reg, alt, kind1, kind2, kind3, kind4) \
- { \
- #reg, alt, sizeof(((GPR *)nullptr)->reg), \
- GPR_OFFSET(reg), eEncodingUint, eFormatHex, \
- {kind1, kind2, kind3, kind4, \
- lldb_##reg##_x86_64 }, \
- nullptr, nullptr, nullptr, 0 \
- }
-
-#define DEFINE_FPR(name, reg, kind1, kind2, kind3, kind4) \
- { \
- #name, nullptr, FPR_SIZE(reg), FPR_OFFSET(reg), eEncodingUint, eFormatHex, \
- {kind1, kind2, kind3, kind4, \
- lldb_##name##_x86_64 }, \
- nullptr, nullptr, nullptr, 0 \
- }
-
-#define DEFINE_FP_ST(reg, i) \
- { \
- #reg #i, nullptr, FP_SIZE, \
- LLVM_EXTENSION FPR_OFFSET( \
- stmm[i]), eEncodingVector, eFormatVectorOfUInt8, \
- {dwarf_st##i##_x86_64, dwarf_st##i##_x86_64, LLDB_INVALID_REGNUM, \
- LLDB_INVALID_REGNUM, lldb_st##i##_x86_64 }, \
- nullptr, nullptr, nullptr, 0 \
- }
-
-#define DEFINE_FP_MM(reg, i) \
- { \
- #reg #i, nullptr, sizeof(uint64_t), \
- LLVM_EXTENSION FPR_OFFSET( \
- stmm[i]), eEncodingUint, eFormatHex, \
- {dwarf_mm##i##_x86_64, dwarf_mm##i##_x86_64, \
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- lldb_mm##i##_x86_64 }, \
- nullptr, nullptr, nullptr, 0 \
- }
-
-#define DEFINE_XMM(reg, i) \
- { \
- #reg #i, nullptr, XMM_SIZE, \
- LLVM_EXTENSION FPR_OFFSET( \
- reg[i]), eEncodingVector, eFormatVectorOfUInt8, \
- {dwarf_##reg##i##_x86_64, dwarf_##reg##i##_x86_64, \
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- lldb_##reg##i##_x86_64 }, \
- nullptr, nullptr, nullptr, 0 \
- }
-
-#define DEFINE_YMM(reg, i) \
- { \
- #reg #i, nullptr, YMM_SIZE, \
- LLVM_EXTENSION YMM_OFFSET(i), eEncodingVector, eFormatVectorOfUInt8, \
- {dwarf_##reg##i##h_x86_64, \
- dwarf_##reg##i##h_x86_64, \
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- lldb_##reg##i##_x86_64 }, \
- nullptr, nullptr, nullptr, 0 \
- }
-
-#define DEFINE_GPR_PSEUDO_32(reg32, reg64) \
- { \
- #reg32, nullptr, 4, \
- GPR_OFFSET(reg64), eEncodingUint, eFormatHex, \
- {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- lldb_##reg32##_x86_64 }, \
- RegisterContextPOSIX_x86::g_contained_##reg64, \
- RegisterContextPOSIX_x86::g_invalidate_##reg64, nullptr, 0 \
- }
-
-#define DEFINE_GPR_PSEUDO_16(reg16, reg64) \
- { \
- #reg16, nullptr, 2, \
- GPR_OFFSET(reg64), eEncodingUint, eFormatHex, \
- {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- lldb_##reg16##_x86_64 }, \
- RegisterContextPOSIX_x86::g_contained_##reg64, \
- RegisterContextPOSIX_x86::g_invalidate_##reg64, nullptr, 0 \
- }
-
-#define DEFINE_GPR_PSEUDO_8H(reg8, reg64) \
- { \
- #reg8, nullptr, 1, GPR_OFFSET(reg64) + 1, eEncodingUint, eFormatHex, \
- {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- lldb_##reg8##_x86_64 }, \
- RegisterContextPOSIX_x86::g_contained_##reg64, \
- RegisterContextPOSIX_x86::g_invalidate_##reg64,\
- nullptr, 0 \
- }
-
-#define DEFINE_GPR_PSEUDO_8L(reg8, reg64) \
- { \
- #reg8, nullptr, 1, GPR_OFFSET(reg64), eEncodingUint, eFormatHex, \
- {LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, \
- lldb_##reg8##_x86_64 }, \
- RegisterContextPOSIX_x86::g_contained_##reg64, \
- RegisterContextPOSIX_x86::g_invalidate_##reg64,\
- nullptr, 0 \
- }
-
-static RegisterInfo g_register_infos_x86_64[] = {
- // General purpose registers. EH_Frame, DWARF,
- // Generic, Process Plugin
- DEFINE_GPR(rax, nullptr, dwarf_rax_x86_64, dwarf_rax_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rbx, nullptr, dwarf_rbx_x86_64, dwarf_rbx_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rcx, "arg4", dwarf_rcx_x86_64, dwarf_rcx_x86_64,
- LLDB_REGNUM_GENERIC_ARG4, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rdx, "arg3", dwarf_rdx_x86_64, dwarf_rdx_x86_64,
- LLDB_REGNUM_GENERIC_ARG3, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rdi, "arg1", dwarf_rdi_x86_64, dwarf_rdi_x86_64,
- LLDB_REGNUM_GENERIC_ARG1, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rsi, "arg2", dwarf_rsi_x86_64, dwarf_rsi_x86_64,
- LLDB_REGNUM_GENERIC_ARG2, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rbp, "fp", dwarf_rbp_x86_64, dwarf_rbp_x86_64,
- LLDB_REGNUM_GENERIC_FP, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rsp, "sp", dwarf_rsp_x86_64, dwarf_rsp_x86_64,
- LLDB_REGNUM_GENERIC_SP, LLDB_INVALID_REGNUM),
- DEFINE_GPR(r8, "arg5", dwarf_r8_x86_64, dwarf_r8_x86_64,
- LLDB_REGNUM_GENERIC_ARG5, LLDB_INVALID_REGNUM),
- DEFINE_GPR(r9, "arg6", dwarf_r9_x86_64, dwarf_r9_x86_64,
- LLDB_REGNUM_GENERIC_ARG6, LLDB_INVALID_REGNUM),
- DEFINE_GPR(r10, nullptr, dwarf_r10_x86_64, dwarf_r10_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(r11, nullptr, dwarf_r11_x86_64, dwarf_r11_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(r12, nullptr, dwarf_r12_x86_64, dwarf_r12_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(r13, nullptr, dwarf_r13_x86_64, dwarf_r13_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(r14, nullptr, dwarf_r14_x86_64, dwarf_r14_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(r15, nullptr, dwarf_r15_x86_64, dwarf_r15_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rip, "pc", dwarf_rip_x86_64, dwarf_rip_x86_64,
- LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_REGNUM),
- DEFINE_GPR(rflags, "flags", dwarf_rflags_x86_64, dwarf_rflags_x86_64,
- LLDB_REGNUM_GENERIC_FLAGS, LLDB_INVALID_REGNUM),
- DEFINE_GPR(cs, nullptr, dwarf_cs_x86_64, dwarf_cs_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(fs, nullptr, dwarf_fs_x86_64, dwarf_fs_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(gs, nullptr, dwarf_gs_x86_64, dwarf_gs_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(ss, nullptr, dwarf_ss_x86_64, dwarf_ss_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(ds, nullptr, dwarf_ds_x86_64, dwarf_ds_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_GPR(es, nullptr, dwarf_es_x86_64, dwarf_es_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
-
- DEFINE_GPR_PSEUDO_32(eax, rax), DEFINE_GPR_PSEUDO_32(ebx, rbx),
- DEFINE_GPR_PSEUDO_32(ecx, rcx), DEFINE_GPR_PSEUDO_32(edx, rdx),
- DEFINE_GPR_PSEUDO_32(edi, rdi), DEFINE_GPR_PSEUDO_32(esi, rsi),
- DEFINE_GPR_PSEUDO_32(ebp, rbp), DEFINE_GPR_PSEUDO_32(esp, rsp),
- DEFINE_GPR_PSEUDO_32(r8d, r8), DEFINE_GPR_PSEUDO_32(r9d, r9),
- DEFINE_GPR_PSEUDO_32(r10d, r10), DEFINE_GPR_PSEUDO_32(r11d, r11),
- DEFINE_GPR_PSEUDO_32(r12d, r12), DEFINE_GPR_PSEUDO_32(r13d, r13),
- DEFINE_GPR_PSEUDO_32(r14d, r14), DEFINE_GPR_PSEUDO_32(r15d, r15),
- DEFINE_GPR_PSEUDO_16(ax, rax), DEFINE_GPR_PSEUDO_16(bx, rbx),
- DEFINE_GPR_PSEUDO_16(cx, rcx), DEFINE_GPR_PSEUDO_16(dx, rdx),
- DEFINE_GPR_PSEUDO_16(di, rdi), DEFINE_GPR_PSEUDO_16(si, rsi),
- DEFINE_GPR_PSEUDO_16(bp, rbp), DEFINE_GPR_PSEUDO_16(sp, rsp),
- DEFINE_GPR_PSEUDO_16(r8w, r8), DEFINE_GPR_PSEUDO_16(r9w, r9),
- DEFINE_GPR_PSEUDO_16(r10w, r10), DEFINE_GPR_PSEUDO_16(r11w, r11),
- DEFINE_GPR_PSEUDO_16(r12w, r12), DEFINE_GPR_PSEUDO_16(r13w, r13),
- DEFINE_GPR_PSEUDO_16(r14w, r14), DEFINE_GPR_PSEUDO_16(r15w, r15),
- DEFINE_GPR_PSEUDO_8H(ah, rax), DEFINE_GPR_PSEUDO_8H(bh, rbx),
- DEFINE_GPR_PSEUDO_8H(ch, rcx), DEFINE_GPR_PSEUDO_8H(dh, rdx),
- DEFINE_GPR_PSEUDO_8L(al, rax), DEFINE_GPR_PSEUDO_8L(bl, rbx),
- DEFINE_GPR_PSEUDO_8L(cl, rcx), DEFINE_GPR_PSEUDO_8L(dl, rdx),
- DEFINE_GPR_PSEUDO_8L(dil, rdi), DEFINE_GPR_PSEUDO_8L(sil, rsi),
- DEFINE_GPR_PSEUDO_8L(bpl, rbp), DEFINE_GPR_PSEUDO_8L(spl, rsp),
- DEFINE_GPR_PSEUDO_8L(r8l, r8), DEFINE_GPR_PSEUDO_8L(r9l, r9),
- DEFINE_GPR_PSEUDO_8L(r10l, r10), DEFINE_GPR_PSEUDO_8L(r11l, r11),
- DEFINE_GPR_PSEUDO_8L(r12l, r12), DEFINE_GPR_PSEUDO_8L(r13l, r13),
- DEFINE_GPR_PSEUDO_8L(r14l, r14), DEFINE_GPR_PSEUDO_8L(r15l, r15),
-
- // i387 Floating point registers. EH_frame,
- // DWARF, Generic, Process Plugin
- DEFINE_FPR(fctrl, fctrl, dwarf_fctrl_x86_64, dwarf_fctrl_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(fstat, fstat, dwarf_fstat_x86_64, dwarf_fstat_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(ftag, ftag, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(fop, fop, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(fiseg, ptr.i386_.fiseg, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(fioff, ptr.i386_.fioff, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(foseg, ptr.i386_.foseg, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(fooff, ptr.i386_.fooff, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(mxcsr, mxcsr, dwarf_mxcsr_x86_64, dwarf_mxcsr_x86_64,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
- DEFINE_FPR(mxcsrmask, mxcsrmask, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM,
- LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM),
+#define DR_OFFSET(reg_index) (LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
----------------
I checked Linux code and perhaps this define should look this way:
```
#define DR_OFFSET(reg_index) \
(LLVM_EXTENSION offsetof(UserArea, dbg) + \
LLVM_EXTENSION offsetof(DBG, dr[reg_index]))
```
Repository:
rL LLVM
https://reviews.llvm.org/D30287
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